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(f. 53v) A merchant has 40 marks of silver alloy [one mark is 8 ounces] with...

(f. 53v) A merchant has 40 marks of silver alloy [one mark is 8 ounces] with 6 and 1/2 ounces per of pure silver per mark. And he has 56 marks of another alloy, with 5 ounces of pure silver per mark. And he wants to make all of this into coinage which will contain 4 and 1/2 ounces of pure silver per mark. I ask how much coinage he will produce and how much copper he will have to add. [Answer: The amount of coinage he can produce is 120 marks. The amount of copper he must add is 24 marks]

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